CLEVELAND -- Thailand's Ariya Jutanugarn won two matches Thursday in the U.S. Women's Amateur to advance to the quarterfinals at The Country Club.
The 16-year-old Jutanuagarn, coming off a successful title defense last week in the Junior PGA Championship, routed Bethany Wu of the U.S. 6 and 4 in the morning, and edged Australia's Ashlee Dewhurst 3 and 2 in the afternoon in the round of 16.
Jutanugarn, also the 2011 U.S. Girls' Junior champion, will face Erynne Lee of the U.S. in the quarterfinals. Lee beat compatriots Elisabeth Bernabe 3 and 2, and Austin Ernst 2 and 1.
"I'm not really thinking about Ariya," said Lee. "I know I have a pretty good resume. But now I'm not too tired after winning. I have an adrenaline rush."
In the other lower-bracket quarterfinal, New Zealand's Lydia Ko will play South Africa's Paula Reto, the oldest quarterfinalist at 22.
The 15-year-old Ko, the top-ranked amateur in the world, scrambled out of deep rough for a halve on the 18th hole to outlast France's Celine Boutier 1-up for a spot in the quarterfinals.
"It was lucky," Ko said. "If I go in that bunker, it's a hard shot."
In the upper-bracket quarterfinals, Canada's Nicole Zhang will face Australia's 16-year-old Su-Hyun Oh, and Jaye Marie Green of the U.S. will play Mexico's Marijosse Navarro.
Zhang beat qualifying medalist Hyo-Joo Kim of South Korea 1-up in the round of 16.
"I found it a lot more difficult because it was so wet," Zhang said about the course, softened by morning rain. "I managed to get it up and down and I've definitely liked my game the last few days."
Friday morning Round of 32:
Hyo-Joo Kim, Korea, def. Isabelle Lendl, Goshen, Conn., 2&1
Nicole Zhang, Canada, def. Cyna Rodriguez, Philippines, 4&3
Jayvie Marie Agojo, Philippines, def. Natalie Gleadall, Canada, 1 up
Su-Hyun Oh, Australia, def. Maia Schechter, Takoma Park, Md., 5&4
Jaye Marie Green, Boca Raton, Fla., def. Andrea Lee, Hermosa Beach, Calif., 2&1
Lisa McCloskey, Houston, Texas, def. Lauren Diaz-Yi, Thousand Oaks, Calif., 4&3
Madeleine Sheils, Boise, Idaho, def. Ashlan Ramsey, Milledgeville, Ga., 1 up
Marijosse Navarro, Mexico, def. Lee Lopez, Whittier, Calif., 1 up
Lydia Ko, New Zealand, def. Amy Anderson, Oxbow, N.D., 3&2
Celine Boutier, France, def. Karen Chung, Livingston, N.J., 1 up
Jessica Vasilic, Anaheim Hills, Calif., def. Diana Fernandez, Paraguay, 6&4
Paula Reto, South Africa, def. Bronte Law, England, 2&1
Ariya Jutanugarn, Thailand, def. Bethany Wu, Diamond Bar, Calif., 6&4
Ashlee Dewhurst, Australia, def. Breanna Elliott, Australia, 20 holes
Austin Ernst, Seneca, S.C., def. Sarah Beth Davis, Victoria, Texas, 3&2
Erynne Lee, Silverdale, Wash., def. Elisabeth Bernabe, Anaheim Hills, Calif., 3&2
Friday afternoon Round of 16:
Nicole Zhang, Canada, def. Hyo-Joo Kim, Korea, 1 up
Su-Hyun Oh, Australia, def. Jayvie Marie Agojo, Philippines, 4&3
Jaye Marie Green, Boca Raton, Fla., def. Lisa McCloskey, Houston, Texas, 2 up
Marijosse Navarro, Mexico, def. Madeleine Sheils, Boise, Idaho, 3&1
Lydia Ko, New Zealand, def. Celine Boutier, France, 1 up
Paula Reto, South Africa, def. Jessica Vasilic, Anaheim Hills, Calif., 4&2
Ariya Jutanugarn, Thailand, def. Ashlee Dewhurst, Australia, 3&3
Erynne Lee, Silverdale, Wash., def. Austin Ernst, Seneca, S.C., 2&1